Passage II
Succession refers to the change in species composition in a given area over ecological time.
Table 1 shows the bird species, the dominant (most common) plants, and the successional time in years (yr) on plots of abandoned farmland studied in Georgia.
The estimated changes in net productivity (grams of organic mass produced per square meter per year [g/m2/yr]) and biomass (kilograms of organic material per square meter [kg/m2]) of plants on abandoned farmland in New York appear in Figures 1 and 2, respectively. Successional time is divided into 3 stages based on the dominant plants.
7. According to Figure 1, at the end of Year 50 the net productivity of the land was closest to:
Your Answer is
Correct Answer is D
Explanation
As can be seen from figure 1, when the abscissa is 50 yr, the corresponding ordinate net productivity is nearly 1200, so 1125 of option D is the closest